/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2006 - 2013 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.formula.parser;
import java.io.StringReader;
import org.pentaho.reporting.libraries.formula.LibFormulaBoot;
import org.pentaho.reporting.libraries.formula.lvalues.LValue;
import org.pentaho.reporting.libraries.formula.operators.DefaultOperatorFactory;
import org.pentaho.reporting.libraries.formula.operators.OperatorFactory;
public class FormulaParser extends GeneratedFormulaParser
{
// This is my parser class
private OperatorFactory operatorFactory;
public FormulaParser()
{
super(new StringReader(""));
operatorFactory = new DefaultOperatorFactory();
operatorFactory.initalize(LibFormulaBoot.getInstance().getGlobalConfig());
}
protected OperatorFactory getOperatorFactory()
{
return operatorFactory;
}
/** @noinspection ThrowableInstanceNeverThrown,ThrowableResultOfMethodCallIgnored */
public ParseException generateParseException()
{
final ParseException parent = super.generateParseException();
return new FormulaParseException
(parent.currentToken, parent.expectedTokenSequences, parent.tokenImage);
}
public LValue parse(final String formula) throws ParseException
{
if (formula == null)
{
throw new NullPointerException("Formula-text given must not be null.");
}
try
{
ReInit(new StringReader(formula));
final LValue expression = getExpression();
if (token.next != null && token.next.image.length() > 0)
{
throw new FormulaParseException("Extra content: '" + token.next.image + "'");
}
return expression;
}
catch (ParseException pe)
{
if (pe instanceof FormulaParseException)
{
throw pe;
}
throw new FormulaParseException(pe);
}
catch (TokenMgrError te)
{
throw new FormulaParseException(te);
}
}
public static void main(final String[] args) throws ParseException
{
LibFormulaBoot.getInstance().start();
final FormulaParser formulaParser = new FormulaParser();
formulaParser.enable_tracing();
System.out.println ("LValue: " + formulaParser.parse("[\\n]"));
System.out.println ("LValue: " + formulaParser.parse("[\"\"]"));
final String s = "[\\\\]";
System.out.println(s);
System.out.println ("LValue: " + formulaParser.parse(s));
System.out.println ("LValue: " + formulaParser.parse("T(\"a\\\\\") = \"a\""));
System.out.println ("LValue: " + formulaParser.parse("[\"[OK]\"]"));
}
}